LUX-ZEPLIN

Research group

Research theme

Sub department

About

Eureca - The european underground rare event calorimeter array

Proceedings of the 6th International Workshop on the Identification of Dark Matter, IDM 2006 (2007) 668-677

Authors:

H Kraus, M Bauer, I Bavykina, A Benoit, J Blumer, A Broniatowski, V Brudanini, G Burghart, P Camus, A Chantelauze, M Chapellier, G Chardin, C Ciemniak, C Copp, M De Jesus, A De Lesquen, H De Schamps, P Di Stefano, L Dumoulin, K Eitel, F Von Feilitzsch, M Fesquet, J Gascon, G Gerbier, C Goldbachi, M Gros, D Hauff, S Henry, M Horn, J Imber, S Ingleby, C Isaila, J Jochum, A Juillard, M Kimmerle, JC Lanfranch, R Lemran, A Lubashevsky, M Luca, M Malek, S Marnieros, R McGowan, V Mikhailik, XF Navick, T Niinikoski, G Nollezi, E Pantic, P Par, L Perevoshchikov, F Petricca, S Pfister, W Potzel, F Probst, F Ritier, K Rottler, V Sanglard, S Scholl, F Schwamm, W Seidel, A Smolnikov, M Stern, M Teshima, B Tolhurst, W Westphal, P Wikus, J Wolf, E Yakushev

Abstract:

EURECA (European Underground Rare Event Calorimeter Array) is a new project, searching for dark matter. The collaboration is comprised largely of the present groups of the CRESST and EDELWEISS experiments and several new groups. The aim is to explore scalar cross sections in the - 10 -9-10-10picobarn region with a target mass of up to one tonne. A major advantage of EURECA is the planned use of more that just one target material (multi target experiment for WIMP identification). In preparation for this largescale experiment, R&D for EURECA is provided through the current phases of CRESST and EDELWEISS.
More details from the publisher

Identification of neutrino flavor in the ANITA experiment

Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007 5:HE PART 2 (2007) 1523-1526

Authors:

BC Mercurio, PW Gorham, SW Barwick, JJ Beatty, DZ Besson, WR Binns, C Chen, P Chen, JM Clem, A Connolly, PF Dowkontt, MA DuVernois, RC Field, DJ Goldstein, A Goodhue, C Hast, CL Hebert, S Hoover, MH Israel, A Javaid, J Kowalski, JG Learned, KM Liewer, JT Link, E Lusczek, S Matsuno, C Miki, P Miočinović, J Nam, CJ Naudet, J Ng, RJ Nichol, KJ Palladino, K Reil, A Romero-Wolf, M Rosen, D Saltzberg, D Seckel, GS Varner, D Walz, F Wu

Abstract:

The ANITA (Antarctic Impulsive Transient Antenna) experiment may be the first experiment to identify astrophysical neutrinos of energy greater than 1018 eV. A Monte Carlo simulation has been developed to determine the sensitivity and improve the event reconstruction capabilities of ANITA at energies up to 1021 eV. Charged leptons created in charged current neutrino-nucleon interactions can produce secondary showers when they experience hard energy losses through bremsstrahlung, pair production, and photonuclear interactions as they propagate through the ice. Because the cross sections of these interactions depend on the flavor and energy of the charged lepton, the distribution of the showers can indicate the flavor and energy of the neutrino. Results from the simulation are presented.

Measuring the askaryan effect in ice with the ANITA instrument

Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007 5:HE PART 2 (2007) 1573-1576

Authors:

J Kowalski, PW Gorham, SW Barwick, JJ Beatty, DZ Besson, WR Binns, C Chen, P Chen, JM Clem, A Connolly, PF Dowkontt, MA Duvernois, RC Field, D Goldstein, A Goodhue, C Hast, CL Hebert, S Hoover, MH Israel, JG Learned, KM Liewer, JT Link, E Lusczek, S Matsuno, B Mercurio, C Miki, P Miǒcinovíc, J Nam, CJ Naudet, J Ng, R Nichol, K Palladino, K Reil, A Romero-Wolf, M Rosen, L Ruckman, D Saltzberg, D Seckel, GS Varner, D Walz, F Wu

Abstract:

Most ultra-high energy neutrino experiments using ice as a target medium rely on the Askaryan effect (coherent impulsive radio Cherenkov radiation from the charge asymmetry in an electromagnetic shower). This effect was measured with the Antarctic Impulsive Transient Antenna (ANITA) experiment at the Stanford Linear Accelerator Center (SLAC) in June 2006. The showers were produced by 28.5 GeV electrons with a number density of 109 electrons per bunch impacting a 7.5 metric ton ice target (roughly 12.5 radiation lengths). In this paper we present the measured angular and frequency dependence of the radiation and compare the results with the predicted response.

Radiofrequency ice properties measurements at Taylor Dome, Antarctica, in support of the ANITA experiment

Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007 3:OG PART 2 (2007) 1241-1244

Authors:

DZ Besson, J Nam, S Matsuno, SW Barwick, JJ Beatty, WR Binns, C Chen, P Chen, JM Clem, A Connolly, PF Dowkontt, MA Duvernois, RC Field, D Goldstein, A Goodhue, PW Gorham, C Hast, CL Hebert, S Hoover, MH Israel, J Kowalski, JG Learned, KM Liewer, JT Link, E Lusczek, B Mercurio, C Miki, P Miočinović, CJ Naudet, J Ng, R Nichol, K Palladino, K Reil, A Romero-Wolf, M Rosen, L Ruckman, D Saltzberg, D Seckel, GS Varner, D Walz, F Wu

Abstract:

Radiowave detection of the Cherenkov radiation produced by neutrino-ice collisions requires an understanding of the radiofrequency (RF) response of cold polar ice. We herein report on a series of radioglaciological measurements performed approximately 10 km north of Taylor Dome Station, Antarctica from Dec. 6, 2006 - Dec. 16, 2006. Using RF signals broadcast from a dual-polarization horn antenna on the surface transmitting signals which reflect off the underlying bed and back up to a dual polarization surface horn receiver, we have made time-domain estimates of both the real (index-of-refraction "n") and imaginary (attenuation length "Latten") components of the complex ice dielectric constant (ε = ε′ +iε′ ′). We have also measured the uniformity of ice response along two orthogonal axes in the horizontal plane. We observe an apparent wavespeed asymmetry of order 0.1%, between two orthogonal linear polarizations projected into the horizontal plane, consistent with some previous measurements, but somewhat lower than others.

Results from the Anita experiment

The Science and Culture Series - Astrophysics; International School of Cosmic Ray Astrophysics 15th Course: Astrophysics at Ultra-High Energies (2007) 213-223

Authors:

A Silvestri, SW Barwick, JJ Beatty, DZ Besson, WR Binns, B Cailo, JM Clem, A Connolly, DF Cowen, PF Dowkontt, MA Du Vernois, PA Evenson, D Goldstein, PW Gorham, CL Hebert, MH Israel, JG Learned, KM Liewer, JT Link, S Matsuno, P Miocinovic, J Nam, CJ Naudet, R Nichol, K Palladino, M Rosen, D Saltzberg, D Seckel, BT Stokes, GS Varner, F Wu

Abstract:

The ANtarctic Impulse Transient Antenna (ANITA) is the first long-duration balloon experiment designed to search and measure the flux of Greisen- Zapsepin-Kuzmin (GZK) neutrinos. We present new limits on neutrinos fluxes of astronomical origin from data collected with the successful launch of a 2- antenna prototype instrument, called ANITA-lite, that circled the Antarctic continent for 18.4 days in January 2004. We performed a search for Ultra- High-Energy (UHE) neutrinos with energies above 3 x 1018 eV. No excess events above the background expectation were observed and a neutrino flux following E-2 spectrum for all neutrino flavors, is limited to Ev-2F < 1.6 × 10-6 GeV cm-2 s-1 sr-1 for 1018.5 eV < Ev < 1023.5 eV at 90% confidence level. The launch of ANITA is scheduled for December 2006. Looking beyond ANITA, we describe a new idea, called ARIANNA (Antarctic Ross Iceshelf ANtenna Neutrino Array), to increase the sensitivity for GZK neutrinos by one order of magnitude better than ANITA. Copyright © 2007 by World Scientific Publishing Co. Pvt. Ltd.